A-LevelPhysicsSuperposition9702/12 · May/June 2024 · Q261 Mark
A diffraction grating with N lines per metre is used to diffract light of various wavelengths λ. The graph shows the relation between the diffraction angle θ and λ for different wavelengths in the nᵗʰ order interference pattern. [Figure 26.1] What is the gradient of the graph?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
ANn
BN/n
Cn/N
D1/Nn
✓ Correct answer
A: Nn
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